Toxicological and repellent potential of some plant extracts against stored product insect pest, Tribolium castaneum (Herbst.) (Coleoptera: Tenebrionidae)

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Research Paper 01/09/2013
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Toxicological and repellent potential of some plant extracts against stored product insect pest, Tribolium castaneum (Herbst.) (Coleoptera: Tenebrionidae)

Fawad Zafar Ahmad Khan, Muhammad Sagheer, Mansoor-ul-Hasan, Shafqat Saeed, Kazam Ali, Hafiza Tahira Gul, Syed Arslan Bukhari, Syed Amir Manzoor
Int. J. Biosci.3( 9), 280-286, September 2013.
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Laboratory experimentations were conducted for the evaluation of contact and repellent activities of acetone based plant extracts of Allium sativum (Garlic), Azadirachta indica (Neem), Citrus limon (Lemon) and Eucalyptus globules (Safaida) against the insect pest of stored grain commodities, Tribolium castaneum. Various concentrations (5, 10 and 15%) of the plant extracts were applied on the filter papers in the bioassay experiments and after the release of 15d old beetles, mortality was evaluated after fixed intervals (24, 48, 72, 96, 120, 144 and 168h). Repellent action was also checked using the area preference method and preference of adult beetles were checked after fixed period (24, 48 and 72h). Contact toxicity experiments revealed that E. globules (9.41%) proved to be more effective followed by A. sativum (9.20%), C. limon (8.39%) and A. indica (7.48%). Repellent action confirmed E. globule (76.29%) to be more potent and A. indica (63.08%), A. sativum (59.62%) and C. limon (50.12%) were least effective, respectively. Results reflected a positive potential of plant extracts as suitable substitute of conventional synthetic insecticides for the management of insect pest attacking stored commodities.


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